BongoBurger

Scott Sowko, a sophomore at Berkeley High School, leaves Bongo Burger after lunching off-campus. School officials say one-tenth of the students take advantage of the healthy lunch served in the school cafeteria. (Noah Berger/Center for Investigative Reporting)

Scott Sowko, a sophomore at Berkeley High School, leaves Bongo Burger after lunching off-campus on Tuesday, April 30, 2013, in Berkeley, Calif. Seated at left are Berkeley High School seniors.